package day05;

import java.util.ArrayList;
import java.util.List;

public class ArrDemo {
    public static void main(String[] args) {
        int[] arr=new int[80];
        int[][] arr2=new int[4][5];
        int[][][] arr3=new int[4][5][6];
        ArrayList arrayList=new ArrayList();
        for(int i=0;i<arr.length;i++){
//            arr[i]=
            arrayList.add(arr[i]);
        }
        int[] arr22=new int[]{3,2,4};
        int[] ar1={};
        char[] ch=new char[]{'A','B','C'};
        System.out.println((int)ch[0]);
        List<String> list1=new ArrayList<>();
        list1.add("hahah");
        list1.add("学习java");
        String s=list1.get(0);;
        System.out.println(list1.get(1));
        System.out.println(list1.size());
        arr22[4]=32;
    }
}
